My online registration opened today. I was unable to book the sports simulator on an at sea day as it was all sold out. Do you know if they hold any of those reservations back so I can register when I get on board? Where would I go to do that? Also, I noticed that for a 60 minute session you can only choose 1 member of your party to register. But can all 4 members of my family use the sports simulator during that session or is it really just limited to the one member you register? Thanks!